package com.sky.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        LambdaQueryWrapper<Employee> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Employee::getUsername,username);
        Employee employee = employeeMapper.selectOne(wrapper);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前文传过来的密码进行加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        //保存在数据库的还是Employee
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置DYO中没有的属性
        employee.setStatus(StatusConstant.ENABLE);
        //密码是用MD5来保存
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //这里应该是当前登陆的管理员
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);

    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //获取页数和页大小
        int pageNum = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();
        String name = employeePageQueryDTO.getName();
        // 创建分页对象
        Page<Employee> page = new Page<>(pageNum, pageSize);
        //创建查询条件
        LambdaQueryWrapper<Employee> wrapper = new LambdaQueryWrapper<>();
        if(name!=null){
            wrapper.like(Employee::getName,name);
        }
        //这里是什么玩意，对吗这
        Page<Employee> employees = employeeMapper.selectPage(page, wrapper);
        //获取记录和大小
        long total = employees.getSize();
        List<Employee> records = employees.getRecords();
        return new PageResult(total,records);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //这里不用mp了，用mp感觉和这个一样的
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        employee.setPassword("******");
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        // TODO 这里有问题，DTO中可能存在空值
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置修改人和修改时间
        //employee.setUpdateUser(BaseContext.getCurrentId());
        //employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }

}
